Weiterleitungskette (vereinfachte, robustere Version)

#!/bin/sh
########################################################################
#
# location-cascade
# $Id: location-cascade,v 1.7 2018/07/05 09:11:51 elias Exp $
#
# Give a list of HTTP redirections for a given URI.
# Requires lynx.
#
########################################################################

# Useragent "Internet Exploiter 10" for best results from spammy sites ;)
UA='Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)'

# Paranoia line
PATH=/bin:/usr/bin

# Temporary file name
tmpfile=`tempfile -p locas` || exit 1

if [ -z "$1" ]
then
    echo "Usage: `basename $0` <URI>" 1>&2
    exit 1
fi

trap "rm -f $tmpfile" 1 2 15
echo $1 >$tmpfile

while [ -s $tmpfile ]
do
    uri=`cat $tmpfile`
    lynx -useragent="$UA" -mime_header "$uri" 2>/dev/null |
    sed '/^\s*$/q' |
    grep -i '^Location:' |
    sed -e 's/^[^:]*:\s*//' -e 's/\s$//' |
    tee $tmpfile
done | nl -

rm -f $tmpfile